I have now received a very unhelpful reply from IX Webhosting, referring me back to the earlier fix, and telling me to get on with it.
Here it is: You will perhaps understand why I am reluctant to undertake this myself:
Let me please inform you that once you updated this ticket I decided to make sure that fresh WordPress installation is working fine and installed it into http://being-in-voice.com/webblog/ directory. Then I discovered that there is the same login issue as you experienced. So, I have searched the Internet and finally found a solution mentioned at the following pages:
In order to implement it I had to remove a code that is marked as dark green as you can see via http://core.trac.wordpress.org/attachment/ticket/12142/12142.diff from the folloeing pages:
After that I was able to access http://being-in-voice.com/webblog/wp-admin page using the following login credentials:
Then I tried to implement the same solution for http://www.being-in-voice.com/blog/ but found that it is still not accepting passwords. Moreover, I found that it does not send passwords using "Forgot Password" link (in http://being-in-voice.com/webblog this option works fine).
According to this, I decided to create a backup of the following tables that belong to 'flloyd2_beingblog' database:
and restore them into flloyd2_flloyd2_webblogtest database I used for /being-in-voice.com/webblog/ blog.
If you check http://being-in-voice.com/webblog/ URL, you will see that it shows your blog as well as all the posts and commends. There is also no problem with admin login.
Kindly please check it from your end. You can try to use mentioned solution in order to recover other blogs in question. Please give it a try and let us know if any issue still persists. If you have any problems recovering sites, please keep us updated and allow us to completely re-install WordPress for these websites including removal of all current WordPress files from the server. Thank you for cooperation with us.
They finally agreed to undertake the same process for the other blog that was playing up (same problem, could not get past the login page). The two sites that were fixed by them are still (last time I checked) working ok.
The real kicker is: how come they work fine, and then suddenly, out of the blue, stop working?
I'd really like an answer from BOTH WordPress, AND IX Webhosting.
Do let me know how you get on.